The values of f(-
We can find the values of a function at some point by just doing the substitution of x to the number we want and then simplifying it, so let's do the first one
[tex]f(x)=-2x-3[/tex]
We want f(4), so instead of "x" I'll put "4"
[tex]f(4)=-2\cdot(4)-3[/tex]
Now we just got to simplify it
[tex]\begin{gathered} f(4)=-2\cdot4-3 \\ \\ f(4)=-8-3 \\ \\ f(4)=-11 \end{gathered}[/tex]
Therefore, f(4) = -11
Now let's solve the second one, here we have another function
[tex]g(x)=2x^2-3x[/tex]
We'll do the exact same process, where we have "x" we will put "-5", then
[tex]g(-5)=2\cdot(-5)^2-3\cdot(-5)[/tex]
Again, let's just simplify it, remember that (-5)^2 = 25, positive.
[tex]\begin{gathered} g(-5)=2\cdot25+15 \\ \\ g(-5)=50+15 \\ \\ g(-5)=65 \end{gathered}[/tex]
Therefore, g(-5) = 65
